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Sensitive Microphone Question

I

iwhitey

Jan 1, 1970
0
I would like to build a very sensitive microphone capable of picking
up extremely low noise at about 3 feet. What approach is typically
used to pick up low amplitude audio signals? Thanks.
 
R

Rod

Jan 1, 1970
0
An old crystal mic, the sort used years ago, we're very sensitive and
produced a good voltage (high impedance) for such purposes. Try car boot
sales etc. They were used with valve tape recorders.
hope this helps.
Rod
 
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